My Blur LT1 XL somehow comes in at a shade under 28lbs. Talas 15mm bolt through fork, SRAM X9 shifters and mechs, Stroker Trail brakes, Middleburn cranks, XC717 rims, Racing Ralphs.
To be honest I wouldnt want it to be any lighter, only comes out in the summer for racey dry XC trails and trips to the Alps. 140mm travel often ends with me getting in a little over my skis, but that set up is still heavy enough that I can just lean back a tad, let the legs and arms flex and the bike will barrel through and hold the line. Any lighter and you are kind of defeating the purpose, the bike would just skip and bounce just when you need it most.